I found this while surfing http://piratedden.blogspot.com/2008/05/unlock-car-door-with-mobile.html is this possible?
I am not sure, sounds logical, the remote control sends a digital signal (which cannot be heard by human ears) from the phone through the phone line to another phone, the digital signal should remain similar in frequency. The amplitude may change though, the signal level may or not not be powerful enough to activate the car signal. I would say possible but not 100%
I have heard this before and someone told me it works but I am not sure! It sounds interesting though!
But for this it is needed to have an hi tech phone or some old NOKIA 3310 will do ? (quality of sound from phone to car system) hm, N3310 do not have loud speakers, maybe N3510 ?
i think it should be possible coz my friends tried it before. but i did not witness the whole process. so i'm not 100% sure that it works. =)